RGB Monitor setup
Posted on 2001-06-21
System: Generic PC, Linux RedHat 7.1 (kernel 2.4.2-2), XFree86 4.0
Video: ATI MACH 64 4 mb
Monitor: Sony/Sun GDM-1962b. Using a Sun-supplied cable adaptor
Problem: Overscan, dim
I managed to install an ex-Sun monitor and get it working on my Linux box by following numerous hints and emails found on various web sites.
Now I am in the "tuning" phase and wonder if anyone can help. The XF86 server selects an 1152x864 24 bit mode that seems to be pretty good, but the raster is a little too wide for the physical screen. There are no external controls on the monitor to reduce the raster size; are there internal controls or hidden commands that can do this?
The other problem is that the raster is quite dim compared to the way it looked on the Sun system. The brighness and contrast controls are already at max, but it is hard to see, even with room lights dimmed. I suspect that this has to do with the voltage levels on the RGB lines or something; is there any way to compensate or tune this to make the raster brighter?
PS: If there is a better group to post this question to, please advise.